Is the TCM part of the powertrain?
And finally, the Powertrain Control Module. The PCM is essentially the ECM and the TCM combined into a single module. Although it may appear like a single unit from the outside in most vehicles, it typically is actually two separate units (the ECM and TCM) housed together.
Does the TCM control the speedometer?
The TCM then sends a VSS message over the CAN communication network to the Body Control Module (BCM). The BCM in turn sends a VSS message to the instrument panel for speedometer operation. So you can have a transmission that shifts correctly, a speedometer that works yet and not read any VSS signal on the scanner.
Where is the TCM located in a car?
While swapping out a box might seem simple, the TCM is located inside the transmission in many modern cars, trucks, and SUVs. Opening the transmission is a laborious task, which is why it is reasonable to expect labor costs of at least $300 to replace the transmission control module.
What does a Transmission Control Module ( TCM ) do?
Your vehicle’s transmission control module (TCM) is like a tiny computer. It has the important job of interpreting electrical sensor output of components in an engine with an automatic transmission . What is a Transmission Control Module?
How long does it take to replace a Transmission Control Module?
The cost of TCM replacement depends on the make and model of your vehicle, plus the cost of parts and labor. It’s also important to factor in the amount of time it could take to replace the module because some imported parts can take 2 to 4 weeks to arrive. TCM Swap & Labor
Why does my Pontiac G6 say lost communication?
Borrowed a diagnostic tool from a friend and it showed the following… lost communication with engine control module/powertrain control module “A”. Also want to add that battery shows only 9 volts at terminals + neg. cable is a bit loose connecting to battery. Will a low battery cause this lost communication thing?
https://www.youtube.com/watch?v=LpiC6l-79fw